Optimal Management of Distribution Networks Regarding Reactive Power Generation

Reactive power is very important in electrical power system; it supports transfer active power, supplies loads with required reactive power, and security operation of electrical power system since it can affect the voltage level. As reactive power is produced from generation units, the cost is no longer free and must be estimated. Therefore, operation cost function for each generation unit must be depend on active and reactive power cost. This paper introduces optimization operation cost for distributed generators (DGs) and capacitor bank in microgrid depending on active and reactive power cost instead of active power cost only, addition to selecting optimal sitting and sizing of the capacitor bank. This study achieves reaching optimal management and verifying required the active and the reactive power with minimum cost to save stability of the system. The main contribution in this paper is illustrated with the new technique which is presented as the Teaching-Learning-Based Optimization (TLBO) technique.